667066770 has 96 divisors (see below), whose sum is σ = 1783192320. Its totient is φ = 172930560.

The previous prime is 667066717. The next prime is 667066853. The reversal of 667066770 is 77660766.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 756730 + ... + 757610.

It is an arithmetic number, because the mean of its divisors is an integer number (18574920).

Almost surely, 2^667066770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667066770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (891596160).

667066770 is an abundant number, since it is smaller than the sum of its proper divisors (1116125550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667066770 is a wasteful number, since it uses less digits than its factorization.

667066770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120 (or 1117 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 45.

The square root of 667066770 is about 25827.6357803032. The cubic root of 667066770 is about 873.7551910146.

The spelling of 667066770 in words is "six hundred sixty-seven million, sixty-six thousand, seven hundred seventy".